/Engine/Plugins/Media/PixelCapture/Source/PixelCapture/Public/PixelCaptureCapturerRHI.h
Implement this with your specific process to capture the incoming frame.
virtual void BeginProcess ( const [IPixelCaptureInputFrame](API\Plugins\PixelCapture\IPixelCaptureInputFrame) & InputFrame, [IPixelCaptureOutputFrame](API\Plugins\PixelCapture\IPixelCaptureOutputFrame) * OutputBuffer )